Virtual Memory

[jason s]

A computer system technique, which gives an application program an influence that it has conterminous working memory, while in reality it may be physically fragmented and may even overflow on to disk storage, is called VIRTUAL MEMORY. A system using such technique turns programming of large applications easier and use real physical memory E.g. RAM more efficiently than those without VIRTUAL MEMORY.

[sam]

Nowadays computers have something like 32 or 64 MB of RAM available for the CPU to use.